Valve.



PATENTED APR. 24, 1906.

F. SGHRBIDT.

VALVE.

APPLICATION FILED MAY 25, 1905.

Fig.1.

g y W JJ V - ordinary globe-valve.

PATENT @FFTGE.

FRANK SOHREIDT, OF MANSFIELD, OHIO.

VALVE.

Specification of Letters 'i atent.

Patented April 24:, 1906.

Application filed May 25,1905. Serial No. 262.282.

T0 at whom it may concern.-

Be it known that I, FRANK SOHREIDT, a citizen of the United States ofAmerica, and a resident of Mansfield, Richland county, Ohio, haveinvented certain new and useful Improvements in Valves, of which thefollowing is a specification.

My invention relates to improvements in safety gas-valves, andespecially to improvements in the valve described and claimed in myLetters Patent No. 792,353, bearing date of the 13th day of June, 1905,(Valve) The objects of my invention are to increase the area or surfaceof the lower disk without increasing the admission-aperture by means ofa plate made integral therewith, which is made larger in diameter toincrease the lifting power of the gas, so as to permit the valve beingheld open with a minimum pressure, thereby making its movement moresensitive to changes or variations in the pressure in the mains, and toprovide a means for preventing the escape of the gas through theventapertures by an auxiliary vent-valve, which permits the air and gasto escape when the valve is closed and prevents air-cushioning when thevalve is opened and held op en by the pressure of the gas.

Another essential feature of my device is the means employed to raiseand open the valve manually after the gas is turned on again or thepressure increased above a predetermined amount.

A further object of my improvement is to afford facilities for guidingthe valve in its travel so as to keep it in perfect alinement when thevalve is being opened or closed, whereby the valve and seats are broughtin perfect contact.

I attain these and other objects by the mechanism illustrated in theaccompanying drawings, in which Figure 1 is a vertical cross-section ofan ordinary globevalve, showing the application of my invention theretowith the valve in closed position. Fig. 2 is a top view.

Reference-figure 1 indicates the body of an An annular upwardlyeXtendingflange 2, interiorly screw-threaded, is made integral with the bodyportion. A cap 3, having a depending annular flange 4, with the lowerportion 5 of its periphery screw-threaded, is adapted to engage with thethreaded portion of the flange 2. The cap is screwed down until the rib6 is brought down in contact with the face 7 of the flange,

forming a closure. A projecting portion 8 is made integral with the cap,having the lower portion formed square or its equivalent shape for thepurpose of providing a means for closing or removing the cap. An annularrib 9, with a face forming a valve-seat, is provided in the innerperiphery of the depending flange 4 adjacent to the top of the cap.

valve 10, consisting of an upper disk 11 and a lower disk 12 of unequaldiameter, is provided and connected together by the wings 13. The outerperipheries of the upper disk 10, the wings 13, and a guiding-plate 14are fitted to the inner periphery of the flange 1,

which keep the valve-disks in perfect alinement when movement isimparted thereto. The lower valve-disk 12 is smaller in diameter thanthe upper disk 11. The plate 14 is con nected to the disk 12 by thedepending flange 16. The construction of the lower disk and plateconnected thereto as herein described permits the gas when the valve isopen to come in contact with the larger area or sur face, thereby makingthe operation of the valve more sensitive to the varying pressure of thegas in the main and providing a means of holding the valve open at avery low pressure.

Reference-figures 17 designate the lower valve-seat. A perforatedbushing 18 is fitted to the inner periphery of the cap, leaving a space19 between the top of the bushing and the face 20 of the cap. In thecenter of the cap an aperture is provided, into which a pinvalve 22,having a collar 23 made integral therewith, is adapted to contact with asimilar surface surrounding the aperture in the cap, which forms avalve-seat. Air-vents are provided, so as to permit the air to escapefrom the chamber 25. When it is desired to raise the valve-disk for thepassage of gas, the stem (1 of the pin-valve is pressed down, therebypermitting the gas or air to escape through the vents 24.

When the valve is closed, the gas that finds its way into the chamber 25passes through the perforated bushing 18 and comes in contact with thecollar 28 of the pin-valve, forcing it in contact with the valve-seatand effectually closing the chamber and preventing the gas fromescaping. When the valve is open, the pin-valve drops down until theface of the collar comes in contact with the top of the bushing, whichaffords a means of support. The weight of the valve and its appliancesis regulated to conform to the pres sure of the gas in the same manneras described in my former application.

It will be noted that while the gas is flowing through the pipes itsescape is prevented by the pressure being used to close all outlets byvalve mechanism. In the lower portion of the valve a boss 27, having anaperture in the center thereof, with an annular seat 28 formed therein,is provided. A com bined releasing-pin and valve is fitted. to theaperture with a portion of the collar 29, adapted to contact with theseat 28, which prevents the escape of gas by its own weight and thepressure of the gas. When the valve is automatically closed by lowpressure in the mains or in case it is cut off or shut off and it isagain turned on or the pressure increased, the gas is prevented fromflowing through for consumption until the valve is opened by manuallyraising the valve by the pin-valve 30 and pressing down on the stem a.The pin-valve 30 is raised by exerting a pressure under the projectingportion 31 of the valve until the top is brought in contact with theboss 32, forcing the valve 12 from its seat, admitting the passage ofgas through the valve, and sustaining and keeping the valve 12 open bythe pressure of the gas. The lower boss 33 is for the purpose ofprotecting the stem of the valve 30.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

1. A valve comprising a body portion, a flanged cap having an internalcircumferential rib adjacent to the top, said rib ground on its lowersurface to form a valve-seat, a seat formed in the valve-body, saidvalve composed of an upper and lower disk of different diameters.

2. A valve comprising a body portion, a flanged cap having an internalcircumferential rib with a valve-seat formed thereon, a pin-valve fittedto the upper portion of said cap, a bushing having apertures providedtherein secured to said cap affording a means of support for saidpin-valve, a main valve composed of an upper and lower disk, an annularflange made integral with the lower disk, wings secured thereto, acombined releasing-pin and valve fitted to an aperture in the bodyportion of the valve and located below the lower disk of the main valvesubstantially as described and for the purpose set forth.

3. A valve comprising a body portion, a

cap having a depending annular flange with an internal rib, a perforatedbushing fitted to the upper portion of said cap, .a pin-valve supportedby said bushing, an upper valvedisk adapted to contact with said rib,depending wings made integral therewith, a guiding-plate secured to saidwings, a flange made integral with said plate and of smaller diameter, alower valve-disk secured to said flange, a combined valve andreleasing-pin fitted to the lower body portion of thevalve.

4. In a valve comprising a body portion, a cap having a dependingcircular flange with a valve-seat formed on the inner periphery thereof,a main valve comprised of two disks of different diameter fitted to saidcircular flange, a pin-valve fitted to upper portion of said cap, abushing secured to said cap. and adapted to support said pin-valve withapertures provided therein for the escape of air from the main-valvechamber, a combined releasing-pin and valve fitted to 'the lower portionof the body of the valve below the main valve as describedv and setforth.

5. A valve comprising a body portion, a flanged cap having an internalrib forming a valve-seat, a bushing secured to the upper portion of saidcap, a pin-valve fitted to an aperture in the upper portion of said cap,a main valve composed of two disks of different diameters, a combinedreleasing-pin and valve secured to the lower portion of the valve belowthe main valve, means for opening the main valve, substantially asdescribed and set forth.

Witnesses:

JOHN H. CAss, N ELLIE A. CAsEY.

